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Can somebody help me with my exam questions?

NTC — Fri, 12 Mar 2010 04:48:26 +0000

1. Identify the characteristics of life and explain each.
2. Explain the cell theory.
3. How can you differentiate between plants and animals?
4. Draw and label the cell membrane.
5. What is an enzyme and what is the function of an enzyme?
6. How can you speed up the chemical reaction?
7. What are the reactants of photosynthesis? What are the products of photosynthesis? What are the reactants of cellular respiration? What are the products of cellular respiration?
8. Compare heterotrophic and autotrophic organisms
9. How does anaerobic and aerobic respiration differ?
10. Animal like protists can move about in pond water. Identify the different ways they can move. Explain each method.
11. What is mitosis? List the stages of mitosis. Explain the identify characteristics of each stage.
12. How does meiosis differ from mitosis? How many eggs cells are produced during meiosis?
13. Define dominance, segregation and independent assortment of genes.
14. How does homozygous and heterozygous genotypes compare?
15. Explain crossing over in sexual reproduction. What is its importance?
16. How does dominance, co-dominance and incomplete dominance in organisms compare?
17. Draw a DNA molecule. How would you explain its structure?
18. How are enzymes produced in cells?
19. Explain the theory of evolution in relation the organisms moving from the simple to the complex
20. Compare homologous structures to vestigial structures.
21. What were the first types of organisms produced? Explain one theory that explains the development of the first types of organisms.
22. Identify the contribution to science made by the following scientists
Gregor Mendel Charles Darwin Jean Lamarck Stanley Miller Fredrick Griffith Watson & Crick Erwin Chargaff Hardy – Weinberg
23. According to Darwin, what is the importance of variation in a species?
24. What is meant by the following terms: speciation, geographic isolation, and reproductive isolation?
25. Compare gradualism and punctuated equilibrium
26. Explain the difference between a population and community. Give examples of each.
27. Why is it necessary for an ecosystem to have balance between the organisms in the ecosystem and the recycling of material in the ecosystem?
28. How can you distinguish between herbivores, carnivores and omnivores?
29. Define; precipitation, condensation, transpiration and evaporation.
30. Create a simple food web. What type of organisms break down the decaying dead organisms and put the nutrients back into the ecosystem?
31. Since human mankind has the greatest impact on the environment, what can mankind do to have a positive impact on the environment?

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dna help please please ?

NTC — Fri, 12 Mar 2010 03:37:09 +0000

Cloning is a process by which
A. undesirable genes may be eliminated.
B. many identical protein fragments are produced.
C. a virus and a bacterium may be fused into one.
D. an organism that is genetically identical to another is made.

Which of the following was not found to be true when the Human Genome Project was completed?
A. Humans have more genes than expected.
B. Most human DNA is noncoding.
C. Many human genes are similar to genes of other species.
D. All humans are almost genetically identical.

plasmid : DNA segment coding for an enzyme ::
A. DNA ligase : double-stranded DNA
B. vector : restriction enzyme
C. cloned cell : DNA ligase
D. recombinant DNA : DNA from another organism

dna help please please ? is a post from: Nature Technology Corporation

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The amplification of recombinant plasmids occurs by:?

NTC — Fri, 12 Mar 2010 01:48:28 +0000

A. the growth of the plasmid DNA.

B. DNA replication of plasmids outside a host cell.

C. the process of growth and division of the host cell.

D. transformation of bacterial cells.

The amplification of recombinant plasmids occurs by:? is a post from: Nature Technology Corporation

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Is "God" a Molecular Phylogeneticist?

NTC — Thu, 11 Mar 2010 23:43:40 +0000

So I’ve recently come across another gem of pseudo-scientific efficacy, propounded by apologists who have an impressively shallow understanding of human genetics. This “idea”, evidently spawned by theologians with an elementary grasp of molecular protein and genetic coding, states that DNA is devised by an intelligent designer, basing the “logical” foundation of this breakthrough on the “Argument from Complexity”, and likening DNA, a 4 letter, 20 amino acid, 64 codon protein synthesis, to binary, a two code system, simply because binary was designed, meaning, somehow, that DNA was also “created”. Let us not forget that binary was a coding system devised for programs that are not carbon based life forms, because they lack the necessary constituent for their own coding.

My question is this: Regardless of the unscientific foundation and supremely improbable basis, why, if god were the scientist behind the curtain, manufacturing every 3 billion letter protein sequence to be as unique and individualistic as the organisms in which they reside, why does he allow, or create, a human or animal with defects in their genetic coding? Why are their chromosomal defects? Why are there defective codes in DNA, in cellular mytosis, and the other engines of sexual selection that prevent us ALL from being equally fit, intelligent, and healthy?

AND DON’T TELL ME FREE WILL, or any other apologistic nonsense. The founders of this theory very explicitly stated that “God” makes each and every DNA sequence for every single organism on the planet.

According to this theory, there are only two options: God makes mistakes in coding, disproving an infallible and omnipotent god.

Or, God intentionally makes these minute errors in the order of genetic coding, disproving an omni-benevolent god.

There are NO other alternative explanations to this idea. There are no “Get Out of Logic Free” cards, and no room for free will. If you think there are any others, you misunderstood the question.

Ask if you need more information.
Tony: Fair enough. But, as religion is so familiar with the "infinite regress", your answer creates another question.

What was the process by which "sin" modified our genetic structure, making us succeptible to coding defects? Did "sin", the intangeable, ephemeral CONCEPT that it is, actually infiltrate the human genome and mutate our protein structure? And if it did, would you not think that evidence of such mutation would be reflected in the sequencing? I often see apologists criticizing the so called "short-comings" of scientific knowledge, but genetics is one of our most advance sciences, and we now have the ability to sequence genomes within human DNA so that they will actually S-P-E-L-L out the ancestral lineage for millions of years, hence how we can factually verify our million year old ancestors, such as Homo Habilis and Ergaster.

So again, wouldn’t we know, with the species Homo Sapien Sapien being so young, if there was a large immediate shift in genetic information?

Is "God" a Molecular Phylogeneticist? is a post from: Nature Technology Corporation

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dou take online high school? do u know biology?!!?

NTC — Thu, 11 Mar 2010 21:56:45 +0000

can u answer these questions ?
1.Relate the use of genetic engineering to the treatment of human illnesses such as hemophilia.
2.Relate genetic engineering technique to the making of vaccines
3.List two ways in which DNA fingerprinting has been useful to society.
and 4!A student states that genetic engineering is perfectly safe and sound. What safety and ethical issues do you think might arise over the use of genetic engineering?
please help!!PLEASE

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Biology help!!!!! ?

NTC — Thu, 11 Mar 2010 18:15:56 +0000

1. Cystic fibrosis and muscular dystrophy are examples of: (1 point)
viral infections
genetic disorders
sexually transmitted diseases
bacterial infections
2. A field of biology that studies ways that DNA can be manipulated for the benefit of humans is: (1 point)
marine biology
entomology
genetic engineering
zoology
3. All of the following are found in both plant and animal cells, except: (1 point)
a cell wall
a cell membrane
mitochondria
endoplasmic reticulum
4. The process by which water passes into or out of a cell is called: (1 point)
solubility
endocytosis
osmosis
selective transport
5. Through the process of homeostasis, organisms are able to: (1 point)
pass genetic information from generation to generation
develop sensitivity to environmental stimuli
maintain constant internal conditions
incorporate nutrients into their cells
6. The process of cellular respiration: (1 point)
is performed by organisms that are incapable of photosynthesis
breaks down food molecules to release stored energyc
occurs before plants are able to carry out photosynthesis
occurs only in animal cells
7. Long chains of amino acids are found in: (1 point)
carbohydrates
proteins
lipids
nucleic acids
8. The internal transport system of the cell consists of a system of membrane channels called: (1 point)
the mitochondria
the nucleus
the chloroplast
the endoplasmic reticulum
9. Oxygen must be present in order for:
(1 point)
glycolysis to occur
ATP production to occur
fermentation to occur
the Krebs cycle to occur
10. The bonds that hold water molecules together in a droplet of water are: (1 point)
ionic bonds
polar covalent bonds
nonpolar covalent bonds
hydrogen bonds
11. The term gamete is used to describe: (1 point)
cells that are diploid
cells with numerous vacuoles
sperm or egg cells
cells with mutations in their DNA
12. The organelles that make sugar in plants are: (1 point)
chloroplasts
mitochondria
nucleus
ribosomes
13. Storing genetic information is a major function of: (1 point)
carbohydrates
lipids
fatty acids
nucleic acids
14. One major reason that pea plants were a good choice for Mendel’s studies is that: (1 point)
pollination is easy to control in pea1
peas are edible and Mendel could eat his experiment afterward
peas have several different forms of a single trait
peas have only two chromosomes in their cells
15. The three major branches of science are: (1 point)
genetic engineering, marine biology, and space science
neuroscience. chemistry, and geology
physical science, earth science, and life science
paleontology, physical science, and biology
16. In nucleic acids, the base guanine always pairs with: (1 point)
adenine
uracil
thymine
cytosine
17. Which of the following is not an organic macromolecule? (1 point)
carbon dioxide
lipid
nucleic acid
carbohydrate
18. An active muscle cell requires a great deal of energy to contract. It is likely that this muscle cell has large numbers of: (1 point)
chloroplasts
mitochondria
chromosomes
vacuoles
19. When mitosis is complete, the two cells that are formed: (1 point)
contain identical copies of DNA
are haploid, unlike the starting cell
vary somewhat depending on how much crossing over has occurred
are sperm in males and eggs in females
20. The nucleus of an oxygen atom contains: (1 point)
negatively charged electrons
both protons and neutrons
only positively charged protons
only neutrons, which have no electrical charge
21. When cells break down food molecules, energy: (1 point)
is released all at once
is converted into body heat and released
is temporarily stored in ATP molecules
causes excitation of electrons in chlorophyll molecules
22. As a result of diffusion, the concentrations of many types of substances: (1 point)
always become greater inside a membrane
eventually become balanced on both sides of a membrane
always remain greater on the outside of a membrane
become imbalanced on both sides of a membrane
23. Red flowers are dominant over white flowers in Indian Paintbrush. What color would a flower with genotype Rr be? (1 point)
red
pink
white
a mixture of red and white petals
24. All organisms possess DNA that: (1 point)
creates energy for the cells
allows sensitivity to environmental stimuli
captures energy from the sun
contains information for growth and development
25. A human with the genotype XY is: (1 point)
a male
a female
26. Proteins are made in cells on organelles called the: (1 point)
ribosomes
mitochondria
nuclei
vacuoles
27. People with Down Syndrome have: (1 point)
45 chromosomes
46 chromosomes
47 chromosomes
no X chromosomes
28. The molecule that transfers amino acids to the cytoplasm for protein synthesis is: (1 point)
DNA
mRNA
rRNA
tRNA

29. In a scientific experiment, the group in which no change was made, and which serves as a re

Biology help!!!!! ? is a post from: Nature Technology Corporation

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Can I get an egine vector if my solution for lamda is a complex number?

NTC — Thu, 11 Mar 2010 08:06:35 +0000

Can I get an egine vector if my solution for lamda is a complex number? is a post from: Nature Technology Corporation

Need Biology Help! Study guide!?

NTC — Thu, 11 Mar 2010 07:25:33 +0000

1.What is homeostasis?
2.Deductive vs. inductive reasoning
3.What do the 1st and 2nd laws of thermodynamics say?
4.Atomic number, atomic mass number, valence shell electrons, octet rule
5.Covalent, ionic, and hydrogen bonds
6.What type of bond makes a water molecule?
7.Definition of energy
8.What is an amino group?
9.What is the range of pH? Acidic and basic pHs
10.Monomers of carbohydrates, proteins, nucleic acids, and lipids
11.Primary, secondary, tertiary, and quaternary protein structure
12.Structure of amino acids
13.Dehydration synthesis vs. hydrolysis
14.What nitrogenous bases are in DNA and RNA?
15.Saturated vs. unsaturated fatty acids
16.Cell membrane structure
17.Carbohydrates used for energy storage
18.What are the different types of lipids?
19.Differences between prokaryotes and eukaryotes
20.Cell size and surface area to volume ratios
21.Rough ER vs. smooth ER
22.Endomembrane system members
23.Hypertonic, isotonic, and hypotonic solutions
24.Phagocytosis vs. pinocytosis
25.Differences between osmosis, simple diffusion, facilitated diffusion, and active transport
26.1st and 2nd laws of thermodynamics
27.Kinetic vs. potential energy
28.Energy levels of reactants and products in relation to endergonic and exergonic
29.Characteristics of enzymes
30.Competitive vs. noncompetitive inhibitors
31.What denatures enzymes?
32.Structure of ATP
33.Oxidation vs. reduction
34.What are the different kinds of organisms that photosynthesize?
35.Products of the light-dependent and light-independent reactions
36.Location and products of glycolysis
37.Location and products of the Krebs cycle
38.What happens during pyruvate oxidation?
39.Fermentation in yeast
40.How does the proton gradient work in cellular respiration?
41.What macromolecules can be used for energy?
42.Regulation of body temperature
43.Regulation of blood sugar: glucagon, insulin, epinephrine, and glycogen

Just answer any ones that you know! Thanks a bunch guys! This is for a college bio class, I need help with the study guide!
well any help would be appreciated lol

Need Biology Help! Study guide!? is a post from: Nature Technology Corporation

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Summarize this paragraph about dna and bacterial growth?

NTC — Thu, 11 Mar 2010 07:12:21 +0000

A scientist is using an ampicillin-sensiitive strain of bacteria that cannot use lactose because it has a nonfunctional gene in the lac operon. She has to plasmids. One contains a functional copy of the affected gene of the lac operon, and the other contains the gene for ampicillin resistance. Using restriction enzymes and DNA ligase, she forms a recombinant plasmid containing both genes. She then adds a high concentration of the plasmid to a tube off the bacteria in a medium for bacterial growth that contains glucose as thee only energy source. This tube (+) and a control tube (-) with similar bacteria but no plasmid are both incubated under the appropriate conditions for growth and plasmid uptake. The scientist then spreads a sample of each bacterial culture (+ and – ) on each of the three types of plates indicated below.

Summarize this paragraph about dna and bacterial growth? is a post from: Nature Technology Corporation

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A Question regarding plasmid vectors for molecular cloning?

NTC — Thu, 11 Mar 2010 06:58:02 +0000

Why is it necessary for a plasmid vector that can be used for molecular cloning in bacteria to carry a
gene that can provide drug resistance to its host bacterium?

A Question regarding plasmid vectors for molecular cloning? is a post from: Nature Technology Corporation

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